package com.kaola.json;

import java.io.IOException;
import java.io.PrintWriter;
import java.util.List;

import javax.servlet.ServletException;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;

import com.kaola.pojo.Category;

public class CategoryJSON extends HttpServlet {

	/**
	 * Constructor of the object.
	 */
	public CategoryJSON() {
		super();
	}

	/**
	 * Destruction of the servlet. <br>
	 */
	public void destroy() {
		super.destroy(); // Just puts "destroy" string in log
		// Put your code here
	}

	/**
	 * The doGet method of the servlet. <br>
	 * 
	 * This method is called when a form has its tag value method equals to get.
	 * 
	 * @param request
	 *            the request send by the client to the server
	 * @param response
	 *            the response send by the server to the client
	 * @throws ServletException
	 *             if an error occurred
	 * @throws IOException
	 *             if an error occurred
	 */
	public void doGet(HttpServletRequest request, HttpServletResponse response)
			throws ServletException, IOException {

		List<Category> categories = (List<Category>) request
				.getAttribute("categories");

		response.setContentType("text/html");
		response.setCharacterEncoding("UTF-8");
		PrintWriter out = response.getWriter();
		out.print("{'categories':[");
		for (int i = 0; i < categories.size(); i++) {
			Category category = categories.get(i);
			if (i == categories.size() - 1) {
				if (category.getCategory() != null) {
					out.print("{'id':'" + category.getId() + "','name':'"
							+ category.getName() + "','grade':'"
							+ category.getGrade() + "','cid':'" + category.getCategory().getId() + "'}");
				} else {
					out.print("{'id':'" + category.getId() + "','name':'"
							+ category.getName() + "','grade':'"
							+ category.getGrade() + "'}");
				}
			} else {
				if (category.getCategory() != null) {
					out.print("{'id':'" + category.getId() + "','name':'"
							+ category.getName() + "','grade':'"
							+ category.getGrade() + "','cid':'" + category.getCategory().getId() + "'},");
				} else {
					out.print("{'id':'" + category.getId() + "','name':'"
							+ category.getName() + "','grade':'"
							+ category.getGrade() + "'},");
				}
			}
		}
		out.println("]}");
		out.flush();
		out.close();
	}

	/**
	 * The doPost method of the servlet. <br>
	 * 
	 * This method is called when a form has its tag value method equals to
	 * post.
	 * 
	 * @param request
	 *            the request send by the client to the server
	 * @param response
	 *            the response send by the server to the client
	 * @throws ServletException
	 *             if an error occurred
	 * @throws IOException
	 *             if an error occurred
	 */
	public void doPost(HttpServletRequest request, HttpServletResponse response)
			throws ServletException, IOException {
		doGet(request, response);
	}

	/**
	 * Initialization of the servlet. <br>
	 * 
	 * @throws ServletException
	 *             if an error occurs
	 */
	public void init() throws ServletException {
		// Put your code here
	}

}
